Direct catalytic alkynylation of N-unprotected trifluoromethyl ketimines allowed an unprecedented direct access to N-unprotected α-tetrasubstituted primary amines without additional deprotection steps.
We report an organocatalyzed direct enantioselective hydrophosphonylation of N-unsubstituted ketimines that affords N-unprotected α-tetrasubstituted α-aminophosphonates without protection/deprotection steps. The reaction is suitable for N-unsubstituted isatin-derived and trifluoromethyl ketimines, affording products in high yields with excellent enantioselectivity. Applications of the reaction and
Synthesis of 1,3,6-triaryl-6-trifluoromethyl-5,6-dihydro-1,3,5-triazine-2,4(1H,3H)-diones by reaction of aryl trifluoromethyl ketone imines with aryl isocyanates
作者:N. V. Mel’nichenko、M. V. Vovk
DOI:10.1134/s1070428012040318
日期:2012.4
Convenient enantioselective synthesis of β-trifluoromethyl-β-aminoketones by organocatalytic asymmetric Mannich reaction of aryl trifluoromethyl ketimines with acetone
作者:Volodymyr A. Sukach、Nataliya M. Golovach、Volodymyr V. Pirozhenko、Eduard B. Rusanov、Mykhaylo V. Vovk
DOI:10.1016/j.tetasy.2008.02.023
日期:2008.4
The L-proline-catalyzed asymmetric Mannich reaction has been performed between aryl trifluoromethyl ketimines and acetone to provide, for the first time, chiral beta-aryl-beta-trifluoromethyl-beta-aminoketones in high yields and with 74-92% enantiomeric excesses. (c) 2008 Elsevier Ltd. All rights reserved.
Enantioselective Synthesis of 2‐Substituted Indoles Bearing Trifluoromethyl Moiety by the Friedel‐Crafts Alkylation Reaction of 4,7‐Dihydroindole with
<i>N</i>
−H Trifluoromethyl Ketimines
The Friedel‐Crafts alkylation reaction of 4,7‐dihydroindole with N‐unprotected trifluoromethyl ketimines by means of chiral phosphoric acid and the subsequent oxidation with DDQ afforded chiral 2‐indolylmethylamines bearing a trifluoromethyl moiety in good to high yields with excellent enantioselectivities under one‐pot conditions. The adduct was transformed without loss of enantioselectivity and the